1MHz, High Efficiency, Step-Up Converter with Internal Switch Wid

The Datasheet Archive - 100 Million Datasheets from 7500 Manufacturers.

1MHz, High Efficiency, Step-Up Converter with Internal Switch Wid

Datasheet Thumbnail

Top Searches for this datasheet

APW7137
1MHz, High Efficiency, Step-Up Converter with Internal Switch
Wide 2.5V Input Voltage Range Built-in N-Channel MOSFET Built-in Soft-Start High Efficiency <1µA Quiescent Current During Shutdown Current-Mode Operation Stable with Ceramic Output Capacitors Fast Transient Response
General Description
APW7137 fixed switching frequency (1MHz typical), current-mode, step-up regulator with integrated N-channel MOSFET. device allows usage small inductors output capacitors portable devices. current-mode control scheme provides fast transient response good output voltage accuracy. APW7137 includes under-voltage lockout, current limit, over-temperature shutdown preventing damage event output overload.
VIN=5V
Current-Limit Protection Over-Temperature Protection with Hysteresis Available Tiny 5-Pin SOT-23 Package (RoHS Compliant)
Efficiency,
Lead Free Green Devices Available
VIN=3.3V
Applications
Cell Phone Smart Phone PDA, PMP, Digital Camera Boost Regulators
VOUT=12V 1000
Output Current, IOUT (mA)
Configuration
Simplified Application Circuit
10µH 1.2M
VOUT
4.7µF
4.7µF
SOT-23-5 (Top View)
APW7137
137k
ANPEC reserves right make changes improve reliability manufacturability without notice, advise customers obtain latest version relevant information verify before placing orders. Copyright ANPEC Electronics Corp. Rev. Oct., 2008 www.anpec.com.tw
APW7137
Ordering Marking Information
APW7137 Assembly Material Handling Code Temperature Range Package Code APW7137
W37X
Package Code SOT-23-5 Operating Ambient Temperature Range Handling Code Tape Reel Assembly Material Lead Free Device Halogen Lead Free Device Date Code
Note: ANPEC lead-free products contain molding compounds/die attach materials 100% matte plate termination finish; which fully compliant with RoHS. ANPEC lead-free products meet exceed lead-free requirements IPC/JEDEC J-STD-020C classification lead-free peak reflow temperature. ANPEC defines "Green" mean lead-free (RoHS compliant) halogen free does exceed 900ppm weight homogeneous material total does exceed 1500ppm weight).
Absolute Maximum Ratings
Symbol TSTG TSDR Maximum Junction Temperature Storage Temperature Range
(Note
Rating -0.3 -0.3 -0.3 Unit
Parameter
Maximum Lead Soldering Temperature, Seconds
Note Stresses beyond those listed under "Absolute Maximum Ratings" cause permanent damage device. These stress ratings only functional operation device these other conditions beyond those indicated operational sections specifications implied. Exposure absolute maximum rating conditions extended periods affect device reliability.
Thermal Characteristics
Symbol Parameter Junction Ambient Thermal Resistance
(Note
Typical Value SOT-23-5
Unit °C/W
Note measured with component mounted high effective thermal conductivity test board free air. exposed package soldered directly PCB.
Recommended Operating Conditions
Symbol VOUT COUT Input Voltage Voltage Converter Output Voltage Input Capacitor Output Capacitor Ambient Temperature Junction Temperature Parameter
(Note
Range -0.3 Unit
Note Refer application circuit further information Copyright ANPEC Electronics Corp. Rev. Oct., 2008 www.anpec.com.tw
APW7137
Electrical Characteristics
Refer typical application circuits. These specifications apply over 3.6V, IOUT 0mA, -40°C 85°C, unless otherwise noted. Typical values 25°C. Symbol Parameter Test Conditions APW7137 Min. Typ. Max. Unit
SUPPLY VOLTAGE CURRENT Input Voltage Range Input Bias Current 85°C, 125°C 1.0V, switching
UNDER-VOLTAGE LOCKOUT UVLO Threshold Voltage UVLO Hysteresis Voltage REFERENCE OUTPUT VOLTAGES VREF ILIM Regulated Feedback Voltage Input Current Switching Frequency Power Switch Resistance Power Switch Current Limit Leakage Current DMAX VTEN Maximum Duty Cycle Soft-Start Duration (Note Voltage Threshold Voltage Hysteresis ILEN Leakage Current Over-Temperature Protection (Note Over-Temperature Protection Hysteresis (Note Note Guaranteed design, production tested. VEN=5V, Rising VEN=0V, VLX=0V VFB=1.1V 25°C 85°C 1.212 1.205 1.23 1.248 1.255 Rising
INTERNAL POWER SWITCH
SOFT-START SHUTDOWN
OVER-TEMPERATURE PROTECTION TOTP Rising
Copyright ANPEC Electronics Corp. Rev. Oct., 2008
www.anpec.com.tw
APW7137
Typical Operating Characteristics
(Refer section "Typical Application Circuits", VIN=3.6V, TA=25oC, unless otherwise specified)
Switching Current Supply Voltage
Reference Voltage Junction Temperature
1.28 1.27
Reference Voltage, VREF
Switching Current, (mA)
VFB=1.0V
1.26 1.25 1.24 1.23 1.22 1.21 1.20 1.19 1.18
Supply Voltage,
Junction Temperature, (°C)
Switch Resistance Junction temperature
Maximum Duty Cycle Supply Voltage
Maximum Duty Cycle, DMAX
Switch Resistance,
VIN=5V VIN=3.6V VIN=2.7
Junction Temperature, (°C)
Supply Voltage,
Switching Frequency Supply Voltage
Switching Frequency Junction Temperature
Switching Frequency, (MHz)
Switching Frequency, (MHz)
Supply Voltage,
Junction Temperature, (°C)
Copyright ANPEC Electronics Corp. Rev. Oct., 2008
www.anpec.com.tw
APW7137
Typical Operating Characteristics (Cont.)
(Refer section "Typical Application Circuits", VIN=3.6V, TA=25oC, unless otherwise specified)
Efficiency Output Current
VIN=5V
Output Voltage Output Current
12.20 12.15
Output Voltage, VOUT(V)
Efficiency,
1000 VOUT=12V VIN=3.3V
12.10 12.05 12.00 11.95 11.90 11.85 11.80
VIN=5V
VIN=3.3V
Output Current, (mA)
1000
Output Current, IOUT (mA)
Output Voltage Supply Voltage
12.20 12.15
Output Voltage, VOUT(V)
12.10 12.05 12.00 11.95 11.90 11.85 11.80
Supply Voltage,
Copyright ANPEC Electronics Corp. Rev. Oct., 2008
www.anpec.com.tw
APW7137
Operating Waveforms
(Refer section "Typical Application Circuits", VIN=3.6V, TA=25oC, unless otherwise specified)
Start-up
VEN, 1V/Div,
Start-up
VEN, 1V/Div,
VOUT, 5V/Div,
VOUT, 5V/Div,
VIN=3.6V IOUT=1mA
IIN, 100mA/Div
IIN, 100mA/Div
Time: 0.5ms/Div CH1: VEN, 1V/Div, CH2: VOUT, 5V/Div, CH3: IIN, 100mA/Div, Time: 0.5ms/Div
Time: 0.5ms/Div CH1: VEN, 1V/Div, CH2: VOUT, 5V/Div, CH3: IIN, 100mA/Div, Time: 0.5ms/Div
VIN=3.6V IOUT=100mA
Normal Operation
VLX, 10V/Div VOUT, 50mV/Div
Normal Operation
VLX, 10V/Div
VOUT, 50mV/Div 100mA/Div
100mA/Div VIN=3.3V IOUT=80mA
Time: 1µs/Div CH1: 10V/Div, CH2: OUT, 50mV/Div, CH3: 100mA/Div, Time: 1µs/Div
Time: 1µs/Div CH1: VLX, 10V/Div, CH2: VOUT, 50mV/Div, CH3: 100mA/Div, Time: 1µs/Div
VIN=5V IOUT=80mA
Copyright ANPEC Electronics Corp. Rev. Oct., 2008
www.anpec.com.tw
APW7137
Operating Waveforms (Cont.)
(Refer section "Typical Application Circuits", VIN=3.6V, TA=25oC, unless otherwise specified)
Load Transient Response
Load Transient Response
VOUT, 200mV/Div,
VOUT, 200mV/Div,
30mA
IOUT, 50mA/Div VIN=3.3V VOUT=12V
30mA IOUT, 50mA/Div Time: 0.5ms/Div CH1: VOUT, 200mV/Div, CH2: IOUT, 50mA/Div, Time: 0.5ms/Div
VIN=3.3V VOUT=12V
Time: 0.2ms/Div CH1: VOUT, 200mV/Div, CH2: IOUT, 50mA/Div, Time: 0.2ms/Div
Load Transient Response
Load Transient Response
VOUT, 200mV/Div,
VOUT, 200mV/Div,
30mA
IOUT, 50mA/Div VIN=5V VOUT=12V
30mA IOUT, 50mA/Div Time: 0.5ms/Div CH1: VOUT, 200mV/Div, CH2: IOUT, 50mA/Div, Time: 0.5ms/Div
VIN=5V VOUT=12V
Time: 0.2ms/Div CH1: VOUT, 200mV/Div, CH2: IOUT, 50mA/Div, Time: 0.2ms/Div
Copyright ANPEC Electronics Corp. Rev. Oct., 2008
www.anpec.com.tw
APW7137
Operating Waveforms (Cont.)
(Refer section "Typical Application Circuits", VIN=3.6V, TA=25oC, unless otherwise specified)
Load Transient Response
Load Transient Response
VOUT, 200mV/Div,
VOUT, 200mV/Div,
IOUT, 50mA/Div 150mA
150mA
30mA Time: 0.1ms/Div CH1: VOUT, 200mV/Div, CH2: IOUT, 50mA/Div, Time: 0.1ms/Div VIN=3.3V VOUT=12V
30mA Time: 0.1ms/Div CH1: VOUT, 200mV/Div, CH2: IOUT, 50mA/Div, Time: 0.1ms/Div
IOUT, 50mA/Div
VIN=3.3V VOUT=12V
Load Transient Response
Load Transient Response
VOUT, 200mV/Div,
VOUT, 200mV/Div,
IOUT, 50mA/Div 150mA
150mA
30mA Time: 0.1ms/Div CH1: VOUT, 200mV/Div, CH2: IOUT, 50mA/Div, Time: 0.1ms/Div VIN=5V VOUT=12V
30mA
IOUT, 50mA/Div
Time: 0.1ms/Div CH1: VOUT, 200mV/Div, CH2: IOUT, 50mA/Div, Time: 0.1ms/Div
VIN=5V VOUT=12V
Copyright ANPEC Electronics Corp. Rev. Oct., 2008
www.anpec.com.tw
APW7137
Operating Waveforms (Cont.)
(Refer section "Typical Application Circuits", VIN=3.6V, TA=25oC, unless otherwise specified)
Line Transient Response
Line Transient Response
VIN, 1V/Div, VOUT, 0.2V/Div,
VIN, 1V/Div, 4.2V 3.2V VOUT, 0.2V/Div,
Time: 0.2ms/Div CH1: VIN, 1V/Div, CH2: VOUT, 0.2/Div, Time: 0.2ms/Div
IOUT=40mA VOUT=12V
Time: 0.2ms/Div CH1: VIN, 1V/Div, CH2: VOUT, 0.2/Div, Time: 0.2ms/Div
IOUT=40mA VOUT=5V
Copyright ANPEC Electronics Corp. Rev. Oct., 2008
www.anpec.com.tw
APW7137
Description
PIN. NAME FUNCTION Switch pin. Connect this inductor/diode here. Power signal ground pin. Feedback Input. device senses feedback voltage regulate voltage 1.23V. Connecting with resistor-divider from output that sets output voltage range from 30V. Enable Control Input. Forcing this above 1.0V enables device. Forcing this below 0.4V shut down. shutdown, functions disabled decrease supply current below 1µA. left this floating. Main Supply Pin. Must closely decoupled with 2.2µF greater ceramic capacitor.
Block Diagram
UVLO
Gate Driver
Control Logic
Over-Temperature Protection Slop Compensation
Current Limit
Current Sense Amplifier
ICMP
Error Amplifier
Oscillator
COMP EAMP VREF 1.23V
Soft-Start
Copyright ANPEC Electronics Corp. Rev. Oct., 2008
www.anpec.com.tw
APW7137
Typical Application Circuits
Typical Supply
4.7µF 10µH 1.2M
VOUT
4.7µF
APW7137
137k
Standard 3.3V Supply
3.3V
4.7µF 4.7µH 430k
VOUT
10µF
APW7137
140k
Brightness control using signal apply
4.7µF 22µH 100Hz~300Hz Duty=100%, ILED=20mA Duty=0%,
VOUT
WLEDs
APW7137
Multiple Output TFT-LCD Power Supply
+13V 0.47µF 0.47µF 0.1µF 0.1µF 0.1µF 0.1µF 0.47µF 4.7µH 4.7µF 430k 10µF 0.47µF
VOUT
APW7137
140k
Copyright ANPEC Electronics Corp. Rev. Oct., 2008
www.anpec.com.tw
APW7137
Function Description
Main Control Loop APW7137 constant frequency current-mode switching regulator. normal operation, internal Nchannel power MOSFET turned each cycle when oscillator sets internal latch, then turned when internal comparator (ICMP) resets latch. peak inductor current which ICMP resets latch controlled voltage COMP node which output error amplifier (EAMP). external resistive divider connected between VOUT ground allows EAMP receive output feedback voltage pin. When load current increases, causes slightly decrease associated with 1.23V reference, which turn, causes COMP voltage increase until average inductor current matches load current. Under-Voltage Lockout (UVLO) Under-Voltage Lockout (UVLO) circuit compares input voltage with UVLO threshold ensure input voltage high enough reliable operation. 100mV (typ) hysteresis prevents supply transients from causing restart. Once input voltage exceeds UVLO rising threshold, startup begins. When input voltage falls below UVLO falling threshold, controller turns converter. Soft-Start APW7137 built-in soft-start control output voltage rise during start-up. During soft-start, internal ramp voltage, connected positive inputs error amplifier, raises replace reference voltage (1.23V typical) until ramp voltage reaches reference voltage. Current-Limit Protection APW7137 monitors inductor current, flows through N-channel MOSFET, limits current peak current-limit level prevent loads APW7137 from damaging during overload short-circuit conditions. Over-Temperature Protection (OTP) over-temperature circuit limits junction temperature APW7137. When junction temperature exceeds thermal sensor turns power MOSFET allowing devices cool. thermal sensor allows converters start soft-start process regulates output voltage again after junction temperature cools 40oC. designed with 40oC hysteresis lower average Junction Temperature (TJ) during continuous thermal overload conditions increasing lifetime device. Enable/Shutdown Driving ground places APW7137 shutdown mode. When shutdown, internal power MOSFET turns off, internal circuitry shuts down, quiescent supply current reduces maximum.
Copyright ANPEC Electronics Corp. Rev. Oct., 2008
www.anpec.com.tw
APW7137
Application Information
Input Capacitor Selection input capacitor (CIN) reduces ripple input current drawn from input supply reduces noise injection into reflected ripple voltage will smaller when input capacitor with larger capacitance used. reliable operation, recommended select capacitor with maximum voltage rating least times maximum input voltage. capacitors should placed close GND. Inductor Selection Selecting inductor with resistance reduces conduction losses achieves high efficiency. efficiency moderated whilst using small chip inductor which operates with higher inductor core losses. Therefore, necessary take further consideration while choosing adequate inductor. Mainly, inductor value determines inductor ripple current: larger inductor value results smaller inductor ripple current lower conduction losses converter. However, larger inductor value generates slower load transient response. reasonable design rule ripple current, maximum average inductor current, IL(AVG). inductor value obtained below,
VOUT (MAX (AVG
peak inductor current calculated following equation: IPEAK IIN(MAX
(VOUT VOUT
IOUT VOUT
N-FET
COUT
ILIM IPEAK
IOUT
Output Capacitor Selection current-mode control scheme APW7137 allows usage tiny ceramic capacitors. higher capacitor value provides good load transients response. Ceramic capacitors with values have lowest output voltage ripple recommended. required, tantalum capacitors used well. output ripple voltages across ideal output capacitor. VOUT VESR VCOUT VCOUT IOUT COUT
where input voltage VOUT output voltage switching frequency IOUT maximum output current amp. Efficiency /IL(AVG) inductor ripple current/average current (0.3 typical) avoid saturation inductor, inductor should rated least maximum input current converter plus inductor ripple current. maximum input current calculated below:
IIN(MAX IOUT (MAX VOUT
VESR IPEAK RESR where IPEAK peak inductor current.
www.anpec.com.tw
Copyright ANPEC Electronics Corp. Rev. Oct., 2008
APW7137
Application Information (Cont.)
Output Capacitor Selection (Cont.) ceramic capacitor application, output voltage ripple dominated VCOUT. When choosing input output ceramic capacitors, with their good recommended.
VOUT
Output Voltage Setting output voltage resistive divider. external resistive divider connected output which allows remote voltage sensing shown "Typical Application Circuits". suggestion maximum value 200k keeping minimum current that provides enough noise rejection ability through resistor divider. output voltage calculated below:
VOUT VREF 1.23
Optimized APW7137 Layout
Diode Selection achieve high efficiency, Schottky diode must used. current rating diode must meet peak current rating converter. Layout Consideration switching power supplies, layout important step design especially high peak currents switching frequencies. layout carefully done, regulator might show noise problems duty cycle jitter. input capacitor should placed close without holes good input voltage filtering. minimize copper trace connections that inject noise into system, inductor should placed close possible minimize noise coupling into other circuits. Since feedback network high impedance circuit feedback network should routed away from inductor. feedback feedback network should shielded with ground plane trace minimize noise coupling into this circuit. star ground connection ground plane minimizes ground shifts noise recommended.
Copyright ANPEC Electronics Corp. Rev. Oct., 2008 www.anpec.com.tw
APW7137
Package Information
SOT-23-5
VIEW
0.25
GAUGE PLANE SEATING PLANE VIEW SOT-23-5 INCHES MIN. MAX. 0.057 0.000 0.035 0.012 0.003 0.106 0.102 0.055 0.037 0.075 0.60 0.012 0.024 0.006 0.051 0.020 0.009 0.122 0.118 0.071 MAX. 1.45 0.15 1.30 0.50 0.22 3.10 3.00 1.80
MILLIMETERS MIN.
0.00 0.90 0.30 0.08 2.70 2.60 1.40 0.95 1.90 0.30
Note Follow JEDEC TO-178 Dimension include mold flash, protrusions gate burrs. Mold flash, protrusion gate burrs shall exceed side.
Copyright ANPEC Electronics Corp. Rev. Oct., 2008
www.anpec.com.tw
APW7137
Carrier Tape Reel Dimensions
SECTION
SECTION
Application
178.0± 2.00
MIN. 4.0± 0.10
8.4+2.00 -0.00 2.0± 0.05
13.0+0.50 -0.20 1.5+0.10 -0.00
MIN. MIN.
20.2 MIN. 0.6+0.00 -0.40
8.0± 0.30 3.20± 0.20
1.75± 0.10 3.10± 0.20
3.5± 0.05 1.50± 0.20 (mm)
SOT-23-5
4.0± 0.10
Devices Unit
Package Type SOT-23-5 Unit Tape Reel Quantity 3000
Copyright ANPEC Electronics Corp. Rev. Oct., 2008
www.anpec.com.tw
APW7137
Taping Direction Information
SOT-23-5
USER DIRECTION FEED
Reflow Condition
(IR/Convection Reflow)
Critical Zone Ramp-up
Temperature
Tsmax
Tsmin Ramp-down Preheat
25°C Peak
Time
Reliability Test Program
Test item SOLDERABILITY HOLT Latch-Up Method MIL-STD-883D-2003 MIL-STD-883D-1005.7 JESD-22-B, A102 MIL-STD-883D-1011.9 MIL-STD-883D-3015.7 JESD
Description 245°C, 1000 Bias @125°C Hrs, 100%RH, 121°C -65°C~150°C, Cycles VHBM 2KV, 200V 10ms, 100mA
www.anpec.com.tw
Copyright ANPEC Electronics Corp. Rev. Oct., 2008
APW7137
Classification Reflow Profiles
Profile Feature Average ramp-up rate Preheat Temperature (Tsmin) Temperature (Tsmax) Time (min max) (ts) Time maintained above: Temperature (TL) Time (tL) Peak/Classification Temperature (Tp) Time within actual Peak Temperature (tp) Ramp-down Rate Time 25°C Peak Temperature Sn-Pb Eutectic Assembly 3°C/second max. 100°C 150°C 60-120 seconds 183°C 60-150 seconds table 10-30 seconds 6°C/second max. minutes max. Pb-Free Assembly 3°C/second max. 150°C 200°C 60-180 seconds 217°C 60-150 seconds table 20-40 seconds 6°C/second max. minutes max.
Note: temperatures refer topside package. Measured body surface. Table SnPb Eutectic Process Package Peak Reflow Temperatures Package Thickness <2.5
Volume <350
Volume
+0/-5°C +0/-5°C
+0/-5°C +0/-5°C
Table Pb-free Process Package Classification Reflow Temperatures Package Thickness Volume <350 Volume 350-2000
Volume >2000
<1.6 +0°C* +0°C* +0°C* +0°C* +0°C* +0°C* +0°C* +0°C* +0°C* Tolerance: device manufacturer/supplier shall assure process compatibility including stated classification temperature (this means Peak reflow temperature +0°C. example 260°C+0°C) rated level.
Customer Service
Anpec Electronics Corp. Head Office No.6, Dusing Road, SBIP, Hsin-Chu, Taiwan, R.O.C. 886-3-5642000 886-3-5642050 Taipei Branch Lane 218, Jhongsing Rd., Sindian City, Taipei County 23146, Taiwan 886-2-2910-3838 886-2-2917-3838
Copyright ANPEC Electronics Corp. Rev. Oct., 2008
www.anpec.com.tw

1MHz, High Efficiency, Step-Up Converter with Internal Switch Wid

Top Searches for this datasheet

Other recent searches